// X16+X12+X5+1  所需要的CRC表
const crc_table = new Uint16Array([                
	0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50a5, 0x60c6, 0x70e7,
	0x8108, 0x9129, 0xa14a, 0xb16b, 0xc18c, 0xd1ad, 0xe1ce, 0xf1ef,
	0x1231, 0x0210, 0x3273, 0x2252, 0x52b5, 0x4294, 0x72f7, 0x62d6,
	0x9339, 0x8318, 0xb37b, 0xa35a, 0xd3bd, 0xc39c, 0xf3ff, 0xe3de,
	0x2462, 0x3443, 0x0420, 0x1401, 0x64e6, 0x74c7, 0x44a4, 0x5485,
	0xa56a, 0xb54b, 0x8528, 0x9509, 0xe5ee, 0xf5cf, 0xc5ac, 0xd58d,
	0x3653, 0x2672, 0x1611, 0x0630, 0x76d7, 0x66f6, 0x5695, 0x46b4,
	0xb75b, 0xa77a, 0x9719, 0x8738, 0xf7df, 0xe7fe, 0xd79d, 0xc7bc,
	0x48c4, 0x58e5, 0x6886, 0x78a7, 0x0840, 0x1861, 0x2802, 0x3823,
	0xc9cc, 0xd9ed, 0xe98e, 0xf9af, 0x8948, 0x9969, 0xa90a, 0xb92b,
	0x5af5, 0x4ad4, 0x7ab7, 0x6a96, 0x1a71, 0x0a50, 0x3a33, 0x2a12,
	0xdbfd, 0xcbdc, 0xfbbf, 0xeb9e, 0x9b79, 0x8b58, 0xbb3b, 0xab1a,
	0x6ca6, 0x7c87, 0x4ce4, 0x5cc5, 0x2c22, 0x3c03, 0x0c60, 0x1c41,
	0xedae, 0xfd8f, 0xcdec, 0xddcd, 0xad2a, 0xbd0b, 0x8d68, 0x9d49,
	0x7e97, 0x6eb6, 0x5ed5, 0x4ef4, 0x3e13, 0x2e32, 0x1e51, 0x0e70,
	0xff9f, 0xefbe, 0xdfdd, 0xcffc, 0xbf1b, 0xaf3a, 0x9f59, 0x8f78,
	0x9188, 0x81a9, 0xb1ca, 0xa1eb, 0xd10c, 0xc12d, 0xf14e, 0xe16f,
	0x1080, 0x00a1, 0x30c2, 0x20e3, 0x5004, 0x4025, 0x7046, 0x6067,
	0x83b9, 0x9398, 0xa3fb, 0xb3da, 0xc33d, 0xd31c, 0xe37f, 0xf35e,
	0x02b1, 0x1290, 0x22f3, 0x32d2, 0x4235, 0x5214, 0x6277, 0x7256,
	0xb5ea, 0xa5cb, 0x95a8, 0x8589, 0xf56e, 0xe54f, 0xd52c, 0xc50d,
	0x34e2, 0x24c3, 0x14a0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
	0xa7db, 0xb7fa, 0x8799, 0x97b8, 0xe75f, 0xf77e, 0xc71d, 0xd73c,
	0x26d3, 0x36f2, 0x0691, 0x16b0, 0x6657, 0x7676, 0x4615, 0x5634,
	0xd94c, 0xc96d, 0xf90e, 0xe92f, 0x99c8, 0x89e9, 0xb98a, 0xa9ab,
	0x5844, 0x4865, 0x7806, 0x6827, 0x18c0, 0x08e1, 0x3882, 0x28a3,
	0xcb7d, 0xdb5c, 0xeb3f, 0xfb1e, 0x8bf9, 0x9bd8, 0xabbb, 0xbb9a,
	0x4a75, 0x5a54, 0x6a37, 0x7a16, 0x0af1, 0x1ad0, 0x2ab3, 0x3a92,
	0xfd2e, 0xed0f, 0xdd6c, 0xcd4d, 0xbdaa, 0xad8b, 0x9de8, 0x8dc9,
	0x7c26, 0x6c07, 0x5c64, 0x4c45, 0x3ca2, 0x2c83, 0x1ce0, 0x0cc1,
	0xef1f, 0xff3e, 0xcf5d, 0xdf7c, 0xaf9b, 0xbfba, 0x8fd9, 0x9ff8,
	0x6e17, 0x7e36, 0x4e55, 0x5e74, 0x2e93, 0x3eb2, 0x0ed1, 0x1ef0
]);
export const CRC={
	value(U8_buffer){
		var crc16=0;
		for(byte in U8_buffer){
			const h8=crc16>>8;
			const l8=crc16<<8;
			crc16 = l8 ^ crc_table[h8 ^ byte];
		}
		return crc16;
	},
	// sign(U8_buffer){
	// 	const crc_val=this.value(U8_buffer);
	// 	U8_buffer[6]=(crc_val>>8)& 0xff;
	// 	U8_buffer[7]=crc_val & 0xff;
	// 	return ;
	// }
};

// def crc_calculate(package):
//     crc = 0
//     for hex_data in package:

//         b2 = hex_data.to_bytes(1, byteorder='little')
//         crc = binascii.crc_hqx(b2, crc)

//     return [(crc >> 8), (crc & 255)]    # 校验位两位




// def action_request(param, ser):
//     global action_list 
//     if len(action_list) != 0:
//         action_name = action_list.pop(0)
//     else:
//         action_name = 'default'

//     # action_name = 'music3'
//     if Debug_flag:
//         print('REQUEST!')
//     pac_data = assemble_string(action_name)
//     total_len = 1 + 2 + len(pac_data) + 2

//     pac_param_len = [len(pac_data) + 1]
//     pac_param_type = [0x03]
//     pac_param = pac_param_len + pac_param_type + pac_data

//     pac_len = [( total_len>> 8), (total_len & 255)]
//     pac_param_count = [0x01]

//     pac_data = RES_PACKAGE_HEAD + pac_len + pac_param_count + pac_param
//     pac_check_sum = crc_calculate(pac_data)
//     res = pac_data + pac_check_sum
    
//     # res_hex = map(lambda x: hex(x), res)
//     # print(list(res_hex))
//     ser.write(res)

//校验接受包是否真确
// function CheckoutBuff(){
// 	var blue_len_chec,bule_checkout;
// 	var crc_ere=Uint8Array([0x3c,0x00,0x00,0x00,0x00,0x01,0x00,0x00,0x00]);
// 	var check_blue_ctp,check_blue_temp;
// 	voiceOT_reset;
// 	while(cbCount(&rxbuf)<7)								
// 	{
// 		voiceOT_check;
// 	}
// 	for(check_blue_ctp=0;check_blue_ctp<7;check_blue_ctp++)		
// 	SER_blue~check_sum2_blue
// 	{
// 		cbRead(&rxbuf,&check_blue_temp);
// 		bluePacket.blue_mini_data[check_blue_ctp+1]=check_blue_temp;
// 	}
// 	blue_len_chec=(bluePacket.packet_blue.packet_lenL_blue)|(bluePacket.packet_blue.packet_lenH_blue<<8);
// 	voiceOT_reset;
// 	while(cbCount(&rxbuf)<blue_len_chec)
// 	{
// 		voiceOT_check;//³¬Ê±¼ì²â£¬µÈ´ýÊý¾Ý
// 	}
// 	 for(check_blue_ctp=0;check_blue_ctp<bluePacket.packet_blue.packet_lenL_blue;check_blue_ctp++)
// 	{
// 		cbRead(&rxbuf,&check_blue_temp);
// 		bluePacket.blue_mini_data[check_blue_ctp+8]=check_blue_temp;
// 	}	
// 	bule_checkout=(bluePacket.packet_blue.check_sum1_blue<<8)|bluePacket.packet_blue.check_sum2_blue;
// 	if(bule_checkout!=CRC_online(bluePacket.blue_mini_data,blue_len_chec))
// 	{
// 		crc_ere[8] = 1;
// 		blueth_usart2_send(crc_ere,9);
// 		return 1;
// 	}
// 	else
// 	{
// 		crc_ere[8] = 0;
// 		blueth_usart2_send(crc_ere,9);
// 		return 0;
// 	}
	
// }